York Affinity 9C Series No error codes, no heat...

Old 05-15-16, 03:08 PM
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York Affinity 9C Series No error codes, no heat...

Not sure what's going on. When I start the heat it goes through all of the prechecks, then the light blinks amber 2 times slowly saying normal operation for call for heat. The motors all spin up, the gas valve clicks, the glow plug heats up, then the gas valve clicks again, and it goes back through the same loop indefinitely. I've waited after the cycles to see if an error code pops up, but still just the amber light blinking 2 times.

The only thing that seems weird to me is how the glow plug is on the left side and the flame sensor is on the right side. When the glow plug heats up, it doesn't glow red all the way over to the flame sensor. I'm assuming the gas would need to fire on the glow plug then it would have flame on that side?

I'm at a loss right now.
Old 05-15-16, 04:04 PM
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Welcome to the forums.

You need to study up on furnace design.

There are multiple burners. One burner gets lit and then it lights the others. So.... the igniter is under the first burner and the flame sensor is at the last one so if ALL the burners don't light... you get a flame sense error.

You need to describe EXACTLY what's going on. The gas valve will never open until the igniter has a chance to warm up.

When there's a call for heat..... the draft inducer starts..... then after xx seconds if the pressure switch is satisfied the igniter starts to heat. After the igniter heats for xx seconds the gas valve should open and the burner should light. After a few seconds the igniter stops heating but the burner should stay lit. If the burner doesn't stay lit more than 8 seconds... the system will default to flame loss.

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